Advisory Details

March 6th, 2026

GStreamer H.266 Codec Parser Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-26-162
ZDI-CAN-28839

CVE ID CVE-2026-3081
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS GStreamer
AFFECTED PRODUCTS GStreamer
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.

The specific flaw exists within the parsing of decoding units. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS GStreamer has issued an update to correct this vulnerability. More details can be found at:
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/2ffdfca2df95a7f605c922d3111e5d5be5314dca
DISCLOSURE TIMELINE
  • 2026-02-11 - Vulnerability reported to vendor
  • 2026-03-06 - Coordinated public release of advisory
  • 2026-03-06 - Advisory Updated
CREDIT Anonymous
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